Audiobus: Use your music apps together.
What is Audiobus? — Audiobus is an award-winning music app for iPhone and iPad which lets you use your other music apps together. Chain effects on your favourite synth, run the output of apps or Audio Units into an app like GarageBand or Loopy, or select a different audio interface output for each app. Route MIDI between apps — drive a synth from a MIDI sequencer, or add an arpeggiator to your MIDI keyboard — or sync with your external MIDI gear. And control your entire setup from a MIDI controller.Download on the App Store
Audiobus is the app that makes the rest of your setup better.
The strangeness of markets
I don't want this to across the wrong way - I fully support music devs and I want them to make money and keep making more wonderful apps for us to enjoy.
But here's the thing. I use mobile and mac pretty equally to make music. This example starts with Klevgrand, but I don't mean to pick on them, it's common practice. I bought all their excellent iOS apps. I use Brusfri a lot and it's in a class of its own for recording in a certain kind of noisy room. The other day I wanted to record using my MacBook in a room that I thought would really benefit from Brusfri, and knowing that they also make AU/VST plugins I went looking for the mac version. It costs 4 times as much ($60 vs $15 last time I checked). The situation with Audio Damage Quanta was even more extreme - $99 for Mac, $9.99 for iOS. I'm sure there are other examples for apps on both platforms.
As far I can tell, the actual products are identical. I would imagine (though I could be wrong) that the code base is largely shared among the platforms. So why the huge difference in price? Is it just because the mac/PC market has more professional musicians in it with bigger pockets, who are used to spending big $$$ for plugins?
Again, I don't begrudge devs making as much money as they can, it just find the magnitude of the difference a bit hard to understand. Would any devs who bridge the two markets care to chime in?